Siemens SINUMERIK 840C - Manual (Page 563)

7 Drive Machine Data (SIMODRIVE Drive MD) 04.96
7.3.2 Drive MD (data description)
Diagnosis control 1650
Default value Lower input limit Upper input limit Units
0000 0000 FFFF Hex
Active
at once
Input to select a variety of diagnostic functions in the diagnostic control word.
Caution:
This machine data is relevant only for Siemens-internal purposes and must not be altered.
Value table:
Bit 0 Min/max memory 0 = not active
1 = active
Bit 1 Segment min/max memory 0 = DSP address name X
1 = DSP address name Y
Bit 2 Comparison with sign 0 = without sign
1 = with sign
Bits 3-7 Not assigned
Bit 8 (up to
SW 4.4) Voltage-controlled V
q
operation 0 = normal operation
1 = V
q
operation active
Bit 9 Reserved
Bits 10-15 Not assigned
Notes:
Bit 1 is effective only if signal number 0 is selected in MD 1651 (signal number min/max
memory).
• Diagnostic function "Min/max memory"
This function can be used to calculate the value range within which a specific memory
location moves over a prolonged period. The function is executed in the current controller
cycle (fastest cycle) in order to ensure reliable detection of all system quantities.
The quantity to be monitored can be selected through specifying either a signal number or
a physical address (see MD 1651).
The comparison of the value with the maximum and minimum values can be implemented
either with or without sign (bit 2).
Corresponding machine data are as follows:
– Diagnosis control (MD 1650, bits 0, 1, 2)
– Signal number min/max memory (MD 1651)
– Memory location min/max memory (MD 1652)
– Minimum value min/max memory (MD 1653)
– Maximum value min/max memory (MD 1654)
7–148 © Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)